Method and System for Deleting Floor in Poc System

1. A method for deleting a floor in a push-to-talk-over-cellular (PoC) system, the method comprising the steps of: transmitting, by a PoC client, a message of making a request to delete the floor reserved in a floor management list to a session management server; and receiving, by the session management server, the floor deletion request message from the PoC client, and deleting the reserved floor.

2. The method according to claim 1 , wherein the step of deleting the reserved floor includes: determining, by the session management server, whether the PoC client transmitting the floor deletion request message has authority to delete the floor, and when the PoC client has authority to delete the floor, deleting the reserved floor.

3. A method for deleting a reserved floor in a push-to-talk-over-cellular (PoC) system, the method comprising the steps of: making, by a PoC client, a request to a session management server to delete the floor reserved in a floor management list; receiving, by the session management server, the floor deletion request message from the PoC client, and determining whether the PoC client is authorized to delete the floor; and denying the floor deletion request when the PoC client is not authorized to delete the floor.

4. The method according to claim 3 , wherein the step of making, by the PoC client, a request to delete the floor reserved in the floor management list includes obtaining permission of the floor deletion authorization from the session management server.

5. The method according to claim 4 , wherein the step of obtaining permission of the floor deletion authorization is performed at any one point of time selected from before the floor deletion request is made, and when the floor deletion request is made.

6. The method according to claim 3 , wherein the floor deletion request message makes use of a TBCP (Talk Burst Control Protocol) message of RTCP APP (Real-time Transport Control Protocol APPlication) packet.

7. The method according to claim 6 , wherein the TBCP message selects any one of reserved values for a subtype field of the RTCP APP packet.

8. A push-to-talk-over-cellular (PoC) system comprising: a PoC client for transmitting a message of making a request to delete a reserved floor; and a session management server for receiving the floor deletion request message from the PoC client, and deleting the reserved floor.

9. The PoC system according to claim 8 , wherein the session management server determines whether the PoC client is authorized to delete the floor, and deletes the reserved floor when the PoC client is authorized to delete the floor.

10. A push-to-talk-over-cellular (PoC) system comprising: a PoC client for transmitting a message of making a request to delete a reserved floor; and a session management server for receiving the floor deletion request message from the PoC client, determining whether the PoC client is authorized to delete the floor, and denying the floor deletion request when the PoC client is not authorized to delete the floor.

11. The PoC system according to claim 10 , wherein the floor deletion request message makes use of a TBCP (Talk Burst Control Protocol) message of RTCP APP (Real-time Transport Control Protocol APPlication) packet.

12. The PoC system according to claim 11 , wherein the TBCP message selects any one of reserved values for a subtype field of the RTCP APP packet.

13. A push-to-talk-over-cellular (PoC) terminal, comprising; means for obtaining permission of floor deletion authorization from a session management server at any one point of time selected from before a floor deletion request is made, and when the floor deletion request is made; and means for transmitting a floor deletion request message to the session management server.

14. The PoC terminal according to claim 13 , wherein the floor deletion request message is a TBCP (Talk Burst Control Protocol) message of RTCP APP (Real-time Transport Control Protocol APPlication) packet.

15. The PoC terminal according to claim 14 , wherein the TBCP message defines any one of reserved values for a subtype field of the RTCP APP packet.